Las Vegas is the most populous city in the U.S. state of Nevada, the seat of Clark County, and an internationally renowned major resort city for gambling, shopping, fine dining, and entertainment. Las Vegas, which bills itself as The Entertainment Capital of the World, is famous for the number of casino resorts and associated entertainment. A growing retirement and family city, it is the 28th most populous city in the United States with an estimated population by the U.S. Census Bureau of 558,383 as of 2008. The estimated population of the Las Vegas metropolitan area as of 2008, was 1,865,746.
Established in 1905, Las Vegas officially became a city in 1911. With the growth that followed, at the close of the century Las Vegas was the most populous American city founded in the 20th century (a distinction held by Chicago in the 19th century). The city's tolerance for various forms of adult entertainment earned it the title of Sin City, and this image has made Las Vegas a popular setting for films and television programs. Outdoor lighting displays are everywhere on the Las Vegas Strip and are seen elsewhere in the city as well. As seen from space, the Las Vegas metropolitan area is the brightest city on Earth.

The name Las Vegas is often applied to unincorporated areas that surround the city, especially the resort areas on and near the Las Vegas Strip. This 4 mi (6.4 km) stretch of Las Vegas Boulevard is mainly in the unincorporated communities of Paradise and Winchester, and continues partly into unincorporated Enterprise.

Geography
Las Vegas is situated on the arid desert floor within Clark County. Correspondingly, the surrounding environment is dominated by desert vegetation and some wildlife, and the area can be subject to torrential flash floods. Enabling the rapid population expansion was a major addition to the city's sewage treatment capacity. The sewage treatment expansion resulted from a U.S. Environmental Protection Agency grant funded 2008 programs to analyze and forecast growth and environmental impacts through the year 2019.
The city is in an arid basin surrounded by dry mountains. City elevation is around 2,030 ft (620 m) above sea level. The Spring Mountains lie to the west. As befits a desert, much of the landscape is rocky and dusty. Within the city, however, there are a great deal of lawns, trees, and other greenery. Due to water resource issues, there is now a movement to encourage xeriscapes instead of lawns. Another part of the water conservation efforts include scheduled watering groups for watering residential landscaping. According to the United States Census Bureau, the city has a total area of 131.3 square miles (340.0 km2), of which 131.2 square miles (339.8 km2) is land and 0.1 square miles (0.26 km2) of it (0.04%) is water.

Redevelopment
When The Mirage opened in 1989, it started a trend of further development of the southern portion of the Las Vegas Strip. This resulted in a drop in tourism from the downtown area but many recent projects and condo construction have seen an increase in visitors to downtown.
A concerted effort has been made by city officials to diversify the economy from tourism by attracting light manufacturing, banking, and other commercial interests. The lack of any state individual or corporate income tax and very simple incorporation requirements have fostered the success of this effort.
Las Vegas has recently enjoyed an enormous boom both in population and in tourism. The urban area has grown outward so quickly that it is beginning to run into Bureau of Land Management holdings along its edges, increasing land values enough that medium- and high-density development is beginning to occur closer to the core. As a reflection of the city's rapid growing population, the new Chinatown of Las Vegas was constructed in the early 1990s on Spring Mountain Road. Chinatown initially consisted of only one large shopping center complex, but the area was recently expanded for new shopping centers that contain various Asian businesses.
With the Strip expansion in the 1990s, the downtown area (which has maintained an old Las Vegas feel) began to suffer. The city made a concerted effort to turn around the fortunes of downtown. The Fremont Street Experience (FSE) was built in an effort to draw tourists back to the area and has proven to be popular in that regard. The multi-level Neonopolis, complete with 11 theaters (managed by Galaxy Theaters, Inc.), was built to offer more retail opportunity and services. Many highrise condo projects have also been underway as downtown is transforming into a livable neighborhood. Other promising signs emerged for the area. The city had successfully lured the Internal Revenue Service operations from the far west of the city to a new downtown building that opened in April 2005. The IRS move is expected to create a greater demand for additional businesses in the area, especially in the daytime hours.
The city purchased 61 acres (25 ha) of property from the Union Pacific Railroad in 1995 with the goal of creating something that would draw more tourists and locals to the downtown area. In 2004 Las Vegas Mayor Oscar Goodman announced plans for the Symphony Park which will include residential and office high-rises, the Lou Ruvo Brain Institute, an academic medical center, The Smith Center for the Performing Arts, and a new City Hall. After failed negotiations with The Related Co. on the development of Union Park in October 2005, San Diego-based Newland Communities was chosen by the city as the new development firm. The Newland contract calls for Dan Van Epp, Newland's regional vice president and former president of the Howard Hughes Corp., to oversee his company's work on Symphony Park. The Lou Ruvo Brain Institute was completed in 2009.
Along with the Symphony Park, other promising residential and office developments have begun construction around downtown Las Vegas. New condominium and hotel high rise projects have changed the entire Las Vegas skyline dramatically in recent years. Many large high-rise projects are planned for downtown Las Vegas as well as the Las Vegas Strip.
In 2004, the city partnered with Cheetah Wireless Technologies and MeshNetwork to pilot a wide area mobile broadband system. The pilot system is installed downtown, around the Fremont Street Experience. In 2005, on a lot adjacent to the city's 61 ac (247,000 m2), the World Market Center opened. It is intended to be the nation's and possibly the world's preeminent furniture wholesale showroom and marketplace, and is meant to compete with the current furniture market capital of High Point, North Carolina.
On October 23, 2006, plans were unveiled to build a World Jewelry Center in Downtown's Symphony Park. Similar to the World Market Center, the WJC will be a one stop shop for jewelry trade shows from around the world. The project proposes a 57-story, 815 ft (248 m) office tower.

Tourism
The major attractions in Las Vegas are the casinos. The most famous hotel casinos are located on Las Vegas Boulevard, better known as the Las Vegas Strip. Many of these hotels are massive, carrying thousands of rooms, with their large adjoining casino areas. There are many hotel casinos in the city's downtown area as well, which was the original focal point of the city's gaming industry in its early days. Several large hotels and casinos are also located somewhat off the Strip but adjacent to it, as well as in the county around the city. As of 2009, total number of hotel rooms in Las Vegas was over 140,000.
Some of the most notable casinos involved in downtown gaming are on the Fremont Street Experience which was granted variances to allow bars to be closer together, similar to the Gaslamp Quarter of San Diego.

Downtown area casinos
Golden Nugget - Four Queens - Binion's Gambling Hall and Hotel - Fremont Casino - Plaza Hotel & Casino - Las Vegas Club - Fitzgeralds Las Vegas - Golden Gate Hotel and Casino - California Hotel and Casino